title: Use of Transcranial Doppler (TCD) ultrasound in the Neurocritical Care Unit.
abstract: Transcranial Doppler (TCD) is a portable device that uses a handheld 2-MHz transducer. It is most commonly used in subarachnoid hemorrhage where cerebral blood flow velocities in major intracranial blood vessels are measured to detect vasospasm in the first 2 to 3 weeks. TCD is used to detect vasospasm in traumatic brain injury and post-tumor resection, measurement of cerebral autoregulation and cerebrovascular reactivity, diagnosis of acute arterial occlusions in stroke, screening for patent foramen ovale and monitoring of emboli. It can be used to detect abnormally high intracranial pressure and for confirmation of total cerebral circulatory arrest in brain death.
authors.affiliation: Division of Neurocritical care, Department of Anesthesiology and Critical Care Medicine, The Johns Hopkins Hospital, 600 N. Wolfe Street, Baltimore, MD 21287, USA.
authors.forename: Atul
authors.initials: A
authors.lastname: Kalanuria
authors.forename: Paul A
authors.initials: PA
authors.lastname: Nyquist
authors.forename: Rocco A
authors.initials: RA
authors.lastname: Armonda
authors.forename: Alexander
authors.initials: A
authors.lastname: Razumovsky
mesh_terms: D001930:Brain Injuries / Q000000981:diagnostic imaging*; D002560:Cerebrovascular Circulation / Q000502:physiology; D003422:Critical Care / Q000379:methods; D006801:Humans; D007427:Intracranial Pressure; D013345:Subarachnoid Hemorrhage / Q000175:diagnosis / Q000000981:diagnostic imaging; D017585:Ultrasonography, Doppler, Transcranial / Q000295:instrumentation*